US7806442B2 - Hose coupling with molded seal insert - Google Patents
Hose coupling with molded seal insert Download PDFInfo
- Publication number
- US7806442B2 US7806442B2 US11/682,131 US68213107A US7806442B2 US 7806442 B2 US7806442 B2 US 7806442B2 US 68213107 A US68213107 A US 68213107A US 7806442 B2 US7806442 B2 US 7806442B2
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- US
- United States
- Prior art keywords
- nipple
- retainer
- hose
- sealing element
- coupling assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
- F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
- F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
- F16L33/2073—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
Definitions
- the present invention relates generally to hose couplings for connecting a flexible hose to a metal tube or tube fitting. More particularly, the invention relates to hose couplings and seal inserts for use with refrigerant lines in air conditioning systems, particularly vehicle air conditioning systems.
- One method for connecting a flexible polymeric hose to a metal tube or tube fitting is to provide one or more grooves on a nipple formed by the end of the tube or as part of the tube fitting.
- the nipple is inserted into an open end of the flexible hose and, in some applications, one or more O-rings may be installed in respective grooves in the nipple to provide a high pressure seal against the escape of fluid, such as refrigerant, through the connection.
- a tubular shell surrounding the hose end and nipple is then crimped to secure the hose to the nipple.
- the present invention provides a hose coupling and seal insert for connecting a flexible hose to a metal tube or tube fitting.
- the hose coupling and seal insert have particular application with refrigerant lines in air conditioning systems, particularly vehicle air conditioning systems.
- the hose coupling comprises a nipple that may be formed by an end portion of a tube or as part of a fitting body, a tubular seal insert, and a crimp collar that may be assembled to or formed integrally with the nipple, or provided separate from the nipple such as in the form of a crimp band.
- the seal insert includes a tubular retainer and at least one annular sealing element made of elastomeric material integrally joined to the retainer.
- the sealing element protrudes radially inwardly from an inner diameter surface of the retainer such that when the sealing element is telescoped over the nipple, the sealing element will effect a seal with an outer diameter surface of the nipple.
- the sealing element also protrudes radially outwardly from an outer diameter surface of the retainer such that when an end portion of a hose is telescoped thereover, the sealing element will effect a seal with an inner diameter surface of the hose end portion.
- the retainer ensures that the sealing element or elements will be properly positioned prior to crimping of the shell around the end portion of the hose.
- the retainer eliminates the need to form a groove or grooves in the nipple, and thus the drawbacks associated therewith.
- the retainer may be made of any suitable material, such as metal or a composite material.
- An axial outer end portion of the nipple may be deformed radially outwardly to form an axial stop preventing axial removal of the retainer from the nipple.
- the retainer is axially trapped between the axial stop and a radially outwardly extending shoulder radially inwardly spaced from the stop by a distance equal or at least equal the axial length of the retainer.
- the retainer may have one or more through holes in the wall thereof, through which portions of the sealing element extend, thereby mechanically locking the sealing element to the retainer.
- the sealing element is molded to the retainer with the elastomeric material thereof flowing through the holes in the retainer wall, thereby to provide a mechanical axial and radial interlock between the sealing element and the retainer.
- the sealing element may have the shape of an O-ring.
- the shape of the crown of the sealing element may be varied as desired, or determined by the hose coupling application.
- the number of sealing elements on insert typically will be from one to three, but more are conceivable.
- the sealing elements and retainer may be formed as a unitary structure from an elastomeric material, whereby the retainer further provides a sealing function in addition to a locating function.
- the crimp collar may have a shell portion that is crimped by radially inwardly deforming annular portions thereof to form radially inwardly protruding beads that engage the end portion of the hose that is surrounded by the shell portion.
- the preferably annular beads may be positioned such that they engage the hose at locations axially outwardly offset from respective annular sealing elements.
- FIG. 1 is a diametral cross-sectional view of an exemplary hose coupling according to the invention, with a hose end inserted into and secured to the coupling;
- FIG. 2 is a cross-sectional view of a seal insert used in the hose coupling of FIG. 1 , taken along the line B-B of FIG. 8 ;
- FIG. 3 is an end elevational view of the seal insert
- FIG. 4 is a perspective view of a retainer used in the seal insert of FIG. 2 , prior to molding of sealing elements thereto;
- FIG. 5 is an end elevational view of the retainer of FIG. 4 ;
- FIGS. 6-9 are sequential views showing the assembly of the hose coupling.
- an exemplary hose coupling according to the invention is designated generally by reference numeral 10 .
- the hose coupling has particular application in air conditioning systems and more particularly in vehicle (automotive, truck, agricultural, off-highway, etc.) air conditioning systems, where refrigerants are used under high pressure conditions. Accordingly, the present invention will be chiefly described in this context, it being understood, however, the principles of the invention may be more generally applicable to fluid couplings and seals.
- the hose coupling 10 provides for connection of a flexible polymeric hose 12 to a nipple 14 that may be formed by an end portion of a metal tube 16 as shown or as part of a tube fitting.
- the coupling in addition to the nipple, comprises a tubular seal insert 18 telescoped over the nipple, and a crimp collar 20 .
- the crimp collar 20 has a tubular shell portion 22 surrounding and spaced radially outwardly from the seal insert 18 to form an annular space for receiving an open end portion of the hose 12 .
- the crimp collar may be formed integrally with a tube fitting, or the crimp collar can be a separate member such as a crimp band. In the illustrated embodiment, the crimp collar is assembled to the nipple so that it will not become separated therefrom during handling.
- the nipple has at it axially inner end a radially outwardly opening recess 24
- the crimp collar has an inturned flange portion 26 extending radially inwardly from an end of the shell portion 22 with the radially inner end of the flange portion 26 captured in the recess 24 .
- the recess may be provided in any suitable manner, although in the illustrated embodiment the recess is formed by radially outwardly protruding external beads 28 and 30 on the tube.
- the wall of the tube 16 may be folded outwardly as by bumping to form the beads, which may extend annularly around the tube. If desired, the end of the tube, beyond the outermost bead 30 , may be swaged radially inwardly to form the nipple 14 that then will have a diameter less than the balance of the tube 16 from which it is formed.
- the tubular seal insert 18 includes a retainer 38 and at least one annular sealing element 40 made of an elastomeric material integrally joined to the retainer. In the illustrated insert, there are two sealing elements 40 maintained axially spaced apart by the retainer 38 .
- Each annular sealing element 40 protrudes radially inwardly and outwardly from inner and outer diameter surfaces of the retainer, respectively.
- the retainer may be made of metal such as steel, a composite material, or any other suitable material.
- the retainer has at least one through hole 42 in a wall thereof, through which a portion of the sealing element extends, thereby mechanically locking the sealing element to the retainer.
- a plurality of equally circumferentially spaced apart holes 42 may be provided for each sealing element.
- the sealing elements are molded to the retainer with the elastomeric material thereof extending through the holes in the retainer wall, thereby to provide a mechanical axial and radial interlock between the sealing element and the retainer.
- Each sealing element 38 may have the shape of an O-ring.
- the shape of the crown of the sealing element may be varied as desired, or determined by the hose coupling application.
- the number of sealing elements on insert typically will be from one to three, but more are conceivable.
- the sealing elements may made of any elastomeric material suitable for the intended application, such as hydrogenated nitrile butadiene rubber (HNBR) or ethylene propylene (EP) rubber.
- HNBR hydrogenated nitrile butadiene rubber
- EP ethylene propylene
- the sealing elements 40 and retainer 38 may be formed as a unitary structure from an elastomeric material, whereby the retainer further provides a sealing function.
- each annular sealing element 40 effects a seal to the nipple and to the inner diameter surface of the hose.
- the seals effected by the sealing elements will be axially spaced apart, and the shell portion may be crimped to form radially inwardly protruding beads 48 that engage the end portion of the hose at locations respectively axially outwardly offset from the annular sealing elements 40 . It can also be seen in FIG.
- an axial outer end portion of the nipple is deformed radially outwardly to form an axial stop 52 preventing axial removal of the retainer from the nipple. More particularly, the retainer is axially trapped between the axial stop 52 and the radially outwardly extending shoulder formed by the bead 30 at the end of the nipple axially opposite the axial stop.
- the inner external bead 28 is formed on the tube at a location axially spaced inwardly from an end of the tube.
- the nipple 14 may be swaged to a reduced diameter.
- the crimp collar 20 is slipped over the nipple 14 until the inturned portion 26 thereof abuts the inner external bead 28 . Then the outer external bead 30 is formed on the tube thereby axially trapping the inturned portion of the crimp collar between the first and second beads to retain the crimp collar on the tube with a tubular shell portion 20 of the crimp collar surrounding and radially outwardly spaced from an end portion of the tube that forms a nipple 14 .
- seal insert 18 is slid over the nipple 14 as illustrated in FIG. 8 , with the sealing elements 40 on the seal insert sealingly engaging the outer diameter surface of the nipple.
- a lubricant can be used if desired to make it easier to slip the seal insert over the nipple.
- the axial outer end portion of the nipple 14 is deformed radially outwardly as illustrated in FIG. 9 , as by bumping or flaring, thereby to form the axial stop preventing axial removal of the retainer from the nipple.
- the coupling 10 is now ready to receive the hose.
- the end of the hose 12 is axially inserted between the shell portion 22 of the crimp collar 20 and the seal insert 18 on the nipple 14 . Then the shell portion is crimped around the hose to secure the hose to the tube as illustrated in FIG. 1 .
- sealing elements 40 have been described as being molded to the retainer, other means may be employed, such as adhesive bonding.
Abstract
Description
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/682,131 US7806442B2 (en) | 2006-03-03 | 2007-03-05 | Hose coupling with molded seal insert |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US77897706P | 2006-03-03 | 2006-03-03 | |
US11/682,131 US7806442B2 (en) | 2006-03-03 | 2007-03-05 | Hose coupling with molded seal insert |
Publications (2)
Publication Number | Publication Date |
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US20080036202A1 US20080036202A1 (en) | 2008-02-14 |
US7806442B2 true US7806442B2 (en) | 2010-10-05 |
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US11/682,131 Active 2029-01-11 US7806442B2 (en) | 2006-03-03 | 2007-03-05 | Hose coupling with molded seal insert |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080213709A1 (en) * | 2005-11-18 | 2008-09-04 | Russell Clayton | Gas supply coupling for a water heater |
US20090302603A1 (en) * | 2005-11-18 | 2009-12-10 | Russell Clayton | Gas supply coupling for a water heater |
US20100264643A1 (en) * | 2008-03-19 | 2010-10-21 | Energy Control Systems, Inc. | Vented gas riser apparatus |
US20110031742A1 (en) * | 2005-08-13 | 2011-02-10 | Eaton Fluid Power Gmbh | Device and method for connecting a hydraulic hose to a connecting nipple |
US20120298242A1 (en) * | 2009-12-11 | 2012-11-29 | Luigi Casella | Tube with an improved connection preferably for an air conditioning system |
WO2019184167A1 (en) * | 2018-03-27 | 2019-10-03 | 日丰企业(佛山)有限公司 | Tube connection device |
US11231133B2 (en) * | 2017-07-26 | 2022-01-25 | NJT Copper Tube Corporation | Tube fitting and tube fitting structure |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012108146B4 (en) * | 2012-09-03 | 2022-05-25 | Viega Technology Gmbh & Co. Kg | Fitting, system with such a fitting and tight connection with such a fitting |
US9470351B2 (en) * | 2013-03-11 | 2016-10-18 | Hanon Systems | Crimp fitting having reversed barbs |
ITMI20140945A1 (en) * | 2014-05-22 | 2015-11-22 | Bremboflex S P A | METHOD FOR MAKING A HOSE FITTING FOR A FLEXIBLE HOSE |
FR3076305B1 (en) * | 2017-12-29 | 2020-11-13 | Victor Jean Ballestra | SANITARY SHREDDER WITH ANNULAR EDGE ANTI-PROJECTION OF POLLUTED WATER |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
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US601683A (en) * | 1898-04-05 | Swivel hose-coupling | ||
US2453997A (en) * | 1946-05-02 | 1948-11-16 | Resistofiex Corp | Fitting for flexible hose |
US3572768A (en) | 1968-12-24 | 1971-03-30 | Ideal Ind | Tubing connector |
US3924883A (en) * | 1974-06-12 | 1975-12-09 | Weatherhead Co | Hose coupling |
US4596410A (en) * | 1984-05-24 | 1986-06-24 | Aeroquip Corporation | Beadlock wrench float fitting |
US4705304A (en) * | 1985-11-13 | 1987-11-10 | Tatsuya Matsuda | Hose coupler for spiral wire reinforced hoses |
JPH05126286A (en) | 1991-11-01 | 1993-05-21 | Nippondenso Co Ltd | Metal fitting for hose |
GB2264338A (en) | 1992-02-22 | 1993-08-25 | Cebo Uk Limited | Hose connector and nipple with sealing sleeve |
US5297822A (en) * | 1989-09-15 | 1994-03-29 | Dayco Products, Inc. | Hose construction and coupling therefor |
US5524939A (en) * | 1987-06-23 | 1996-06-11 | Proprietary Technology, Inc. | Apparatus for and method of attaching hoses and tubes to a fitting |
US5582437A (en) * | 1992-09-21 | 1996-12-10 | Proprietary Technology, Inc. | Swivelable connector for plain end tubes |
US5853202A (en) * | 1997-06-17 | 1998-12-29 | Teleflex Incorporated | Hose end fitting assembly |
US5868435A (en) * | 1987-06-23 | 1999-02-09 | Proprietary Technology, Inc. | Apparatus for and method of attaching conduits to a fitting |
US6059338A (en) | 1996-02-28 | 2000-05-09 | Mannesmann Ag | Pipe connection |
US20050099005A1 (en) * | 2003-11-07 | 2005-05-12 | Wolfgang F. Fullbeck | Fitting for a flexible metal hose |
-
2007
- 2007-03-05 US US11/682,131 patent/US7806442B2/en active Active
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US601683A (en) * | 1898-04-05 | Swivel hose-coupling | ||
US2453997A (en) * | 1946-05-02 | 1948-11-16 | Resistofiex Corp | Fitting for flexible hose |
US3572768A (en) | 1968-12-24 | 1971-03-30 | Ideal Ind | Tubing connector |
US3924883A (en) * | 1974-06-12 | 1975-12-09 | Weatherhead Co | Hose coupling |
US4596410A (en) * | 1984-05-24 | 1986-06-24 | Aeroquip Corporation | Beadlock wrench float fitting |
US4705304A (en) * | 1985-11-13 | 1987-11-10 | Tatsuya Matsuda | Hose coupler for spiral wire reinforced hoses |
US5868435A (en) * | 1987-06-23 | 1999-02-09 | Proprietary Technology, Inc. | Apparatus for and method of attaching conduits to a fitting |
US5524939A (en) * | 1987-06-23 | 1996-06-11 | Proprietary Technology, Inc. | Apparatus for and method of attaching hoses and tubes to a fitting |
US5297822A (en) * | 1989-09-15 | 1994-03-29 | Dayco Products, Inc. | Hose construction and coupling therefor |
US5486023A (en) | 1989-09-15 | 1996-01-23 | Dayco Products, Inc. | Hose construction, coupling therefor and methods of making the same |
JPH05126286A (en) | 1991-11-01 | 1993-05-21 | Nippondenso Co Ltd | Metal fitting for hose |
GB2264338A (en) | 1992-02-22 | 1993-08-25 | Cebo Uk Limited | Hose connector and nipple with sealing sleeve |
US5582437A (en) * | 1992-09-21 | 1996-12-10 | Proprietary Technology, Inc. | Swivelable connector for plain end tubes |
US6059338A (en) | 1996-02-28 | 2000-05-09 | Mannesmann Ag | Pipe connection |
US5853202A (en) * | 1997-06-17 | 1998-12-29 | Teleflex Incorporated | Hose end fitting assembly |
US20050099005A1 (en) * | 2003-11-07 | 2005-05-12 | Wolfgang F. Fullbeck | Fitting for a flexible metal hose |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110031742A1 (en) * | 2005-08-13 | 2011-02-10 | Eaton Fluid Power Gmbh | Device and method for connecting a hydraulic hose to a connecting nipple |
US9879806B2 (en) | 2005-08-13 | 2018-01-30 | Eaton Industrial IP GmbH & Co. KG | Device and method for connecting a hydraulic hose to a connecting nipple |
US20080213709A1 (en) * | 2005-11-18 | 2008-09-04 | Russell Clayton | Gas supply coupling for a water heater |
US20090302603A1 (en) * | 2005-11-18 | 2009-12-10 | Russell Clayton | Gas supply coupling for a water heater |
US20100264643A1 (en) * | 2008-03-19 | 2010-10-21 | Energy Control Systems, Inc. | Vented gas riser apparatus |
US7931306B2 (en) * | 2008-03-19 | 2011-04-26 | Energy Control Systems, Inc. | Vented gas riser apparatus |
US20120298242A1 (en) * | 2009-12-11 | 2012-11-29 | Luigi Casella | Tube with an improved connection preferably for an air conditioning system |
US11231133B2 (en) * | 2017-07-26 | 2022-01-25 | NJT Copper Tube Corporation | Tube fitting and tube fitting structure |
WO2019184167A1 (en) * | 2018-03-27 | 2019-10-03 | 日丰企业(佛山)有限公司 | Tube connection device |
Also Published As
Publication number | Publication date |
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US20080036202A1 (en) | 2008-02-14 |
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Owner name: PARKER-HANNIFIN CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAXI, NIKHIL;SHILAD, ISSAC;NAAB, STEFAN;REEL/FRAME:019325/0597;SIGNING DATES FROM 20070501 TO 20070516 Owner name: PARKER-HANNIFIN CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAXI, NIKHIL;SHILAD, ISSAC;NAAB, STEFAN;SIGNING DATES FROM 20070501 TO 20070516;REEL/FRAME:019325/0597 |
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